Balanced suction and force pump.



PATENTBD PEB. 27, 1906.

P. H. J. PAINDAVOINB & P. A. PAINDAVOINE-DUPOUR.

APPLICATION FILED SEPT. 23, 1904.

BALANCED SUGTION AND FORCE PUMP.

nvm/6355 No. 813,821. PATBNTED PEB. 2'7, 1906. P. H. J. PAINDAVOINE & P. A. PAINDAVOINB-DUPOUR. BALANCED SUCTION AND FORCE PUMP.

f APPLICATION FILED sBPT.23. 1904.

2 SHEETS-SHEET 2.

Rig. 3

UNITED STATES PATENT OFFICE.

PIERRE HIPPOLYTE JULES PAINDAVOINE AND PIERRE ANTOINE PAIN- DAVOINE-DUFOUR, OF LES FONTANETTES LA CHAPELLE AUX POTS, FRANCE.

Specification of Letters Patent.

Patented Feb. 27, 1906.

Application filed September 23, 1904:. Serial No. 225,622,

T0 all whom t may concern.-

Be it known that we, PIERRE HIPPOLYTE JULES PAINDAvoINE and PIERRE ANTOINE PAINDAvoINE-DUFOUR, citizens of the French Republic, residing at Les Fontanettes a la Chapelle aux Pots, Oise, France, have invented certain new and useful Improvements in Balanced Suction and Force Pumps, of which the following is a speciiication.

This invention has for its object a suction and force pump in which the effort required for operating it is distributed and rendered uniform, thus rendering its running exceedingly easy, so that far less fatigue is occasioned than would be necessary for operating under the same working. conditions an ordinary suction and force pump.

This form of pump is characterized by the fact that the piston is hollow and constitutes a vessel iilled with water permanently and communicating by meansk of valves with the cylinder-chamber into which opens the suction-pipe furnished with a valve in the ordinary manner, this hollow piston being permanently in communication with the force-pipe and being balanced either by a counterweight mounted on the operatinglever or by means of a column of water acting upon its lower face in such a manner that when this piston descends it sucks in the ordinary conditions the liquid which passes through the suction-valve and iills the cylinder above the piston, and when it rises this mass of water contained in the cylinder passes through the valves of this piston and enters this chamber, thereby causing a corresponding. quantity of water to be forced out of this latter.

The invention is hereinafter described with reference to the accompanying drawings, in which- Figure l is a vertical section through one constructional form of this pump. Fig. 2 is a horizontal section on the line 2 2 of Fig. 1. Figs. 3, 4, and 5 are diagrammatic views illustrative of modiiications.

This pump comprises a cylinder A, surmounted by a column B and in which moves a hollow piston C, surmounted by a column D in permanent communication with its chamber and adjusting itself in the column B. This piston C D is connected by means of a rod or cable E to an operating-lever F,

oscillating at the point f of a suitable support and connected bya cable g to a oounterweight G, calculated in such a manner as to balance the piston O D, filled with water. The upper face of the piston O comprises orifices c,

which maybe obturated by a valve H, con- The operation is as follows: The hollow piston O D being at the lower part of its stroke, as shown in the drawings, and the chamber of this piston and also the portion of the column B above the tube D being assumed to be filled with water, the orifices c of the piston O are obturated by the float-valve H. In these conditions communication is intercepted between the chamber of the piston O D and the chamber of the cylinder A, situated above it. If the lever F is acted upon in such a manner as to cause the piston O D to eiect its ascending stroke-that is to say, so that its upper wall comes to the top of the cylinder A-then its descending stroke, and so on in succession, the following. phe- The suction ofnomena take place: During this descending stroke the valve i rises and permits of the passage of the water, which enters through the pipe I and fills the cylinder A. Then during the succeeding ascent of the piston the valve i closes, the valve H opens, and the oriiices c permit of the passage of the mass of water contained in the cylinder A, which enters in .this manner the chamber ofthe piston C, thereby producing forcing and discharge through the orifice J. When the piston O D is at the bottom of its descending stroke, the orifice d establishes communication between the column of water contained in the column B and the mass of water contained in the cylinder A, and this decreases the effort necessary for the displacement of the iioat-valve H.

This form of pump presents the advantage that the force to operate the same is expend- IOO ed in a uniform and steady manner and not intermittently, as is the case with the ordinary reciprocating piston-pump. In ordinary suction and force pumps when the ascent of the piston takes place the pressure upon this latter is equal to H. (S equals surface and H equals the height of the piston.) If a counterweight be added at the extremity of the piston-rod, this counterweight would counterbalance the force exerted by the piston. The forcing operation having been completed, the piston reascending and its valve having to open for the forcing operation, the pressure of the column of forcing-water, which was equal to S H, is nulliiied. rIhe counterweight would therefore be useless, since it would be necessary to exert another effort for raising the lever with this counterweight and produce the descent of the piston. In Athe form of pump which forms the subject of this invention, on the other hand, the counterweight serves a useful purpose and balances and distributes the effort throughout the entire duration of the operation. The pressure exerted by the mass of water upon the end of the hollow piston always balances it, because during the descent of this piston the volume of water contained in this latter and the forcin -column has no communication with the vo urne of water sucked in contained in the cylinderA above the piston. The valve H permitting of the admission of the volume of water sucked into the piston and the forcingcolumn, the pressure to be exerted is equal to S H plus the losses of charge due to alterations and friction, as in other pumps.

It should be understood that the invention is not confined to any particular constructional details, those represented in the drawings being given by way of example only. It should be noted that the joints of the cylinder A with the piston C and of the column B with the tube E are preferably produced by adapting the packing to the cylinder and to the column, as indicated at K, as this facilitates the construction.

The invention is capable of numerous modifications. Thus, for example, the counterweight G may be dispensed with. It is replaced by the load of a column of water acting beneath the piston C and which is obtained by connecting the lower part of the cylinder A to the tube B by means of a pipe L. The invention may also be carried into practice in the manner diagrammatically shown in Fig. 3. In a cylinder A move two pistons C C', rigidly connected one with the other by means of the operating-rod E. The upper piston C comprises orifices c, which may be obturated by a float-valve H. The suction takes place at the upper part of the cylinder through the pipe I, provided with the valve i, and forcing takes place through a pipe J, opening into the space between the two pistons C and C. The principle of operation is the same as already described relatively to the form of apparatus represented in Figs. 1 and 2. The two rigidly-connected pistons C and Cl constitute, in fact, a hollow piston similar to the hollow piston C of the pump illustrated in Figs. l and 2, in which the lateral wall serves no other purpose than to connect the upper and lower walls of the piston. In the arrangement shown in Fig. 3 this wall is omitted and the connection between the two walls represented by the pistons C and C is directly effected by means of the rod E. As in the arrangement shown in Figs. l and 2, this pump may be constructed with an actual counterweight or with one represented by a column of water. In this case the end of the cylinder is connected by a pipe L to the forcing-column.

It should be noticed that when two pumps are coupled, whether they be pumps of the kind represented in Figs. l and 2 or of the kind shown in Fig. 3, equilibrium is obtained simply by causing the cylinders to communicate at their lower part by means of a pipe L2.

Having now particularly described and ascertained the nature of our said invention and in what manner the same is to be performed, we declare that what we claim isl. A pump comprising a cylinder of relatively large diameter, and provided with an upward extension of relatively small diameter, a hollow piston within the cylinder provided with openings in its upper face, an upward extension on the piston for engaging the extension of the cylinder, a bracket on the extension of the cylinder, a handle pivoted to the bracket, a piston-rod connecting the handle with the lower face of the piston, a float-valve in the piston, and provided with an opening to engage the piston-rod, a supply-pipe communicating with the cylinder above the piston, a valve in the supply-pipe, and a tube forming a communication between the extension of the cylinder and the space below the piston.

2. A pump comprising a cylinder, a hollow piston within the cylinder, means for elevating and depressing the cylinder, a float-valve within the piston, a supply-pipe communicating with the cylinder above the piston and means acting on the bottom of the piston to assist in elevating the same.

3. A pump comprising a cylinder, a hollow piston within the cylinder, means for elevating and depressing the cylinder, a float-valve within the piston and means for equalizing the pressure on the upper and the lower faces of the cylinder comprising a tube forming a communication between the space above and the space below the piston.

4. A pump comprising a cylinder, a hollow piston within the cylinder, means for elevating and depressing the cylinder, a float-valve within the cylinder, a supply-pipe commu- IOO IIO

IIS

nicating with the cylinder above the piston, and means whereby the iuid above the piston may communicate with the space below the piston to equalize the pressure on the opposite faces of the piston.

5. A pump comprising a cylinder, a hollow piston within the cylinder, means for elevating and depressing the piston, a iioat-valve within the piston, a supply-pipe communieating with the cylinder above the piston and independent means acting on the bottom of the piston to assist in elevating the same.

6'. A pump comprising a cylinder, a hollow piston within the cylinder7 means for elevat- 15 ing and depressing the piston, a float-valve within the piston, a supply-pipe communicating with the cylinder above the piston and independent means acting beneath the piston to assist in elevating the same.

In witness whereof We have hereunto set our hands in presence of two witnesses.

PIERRE HIPPOLYTE JULES PAINDAVOINE. PIERRE ANTOINE PAINDAVOINE-DUFOUR.

Witnesses:

JOHN BAKER, ARMAND PICARD. 

